[mlir] Simplify code with MapVector::operator[] (NFC)

[kazutakahirata]

No description provided.

[llvmbot]

@llvm/pr-subscribers-mlir

Author: Kazu Hirata (kazutakahirata)

Changes

---

Full diff: https://github.com/llvm/llvm-project/pull/113407.diff

1 Files Affected:

• (modified) mlir/lib/Conversion/PDLToPDLInterp/PredicateTree.cpp (+1-1)

diff --git a/mlir/lib/Conversion/PDLToPDLInterp/PredicateTree.cpp b/mlir/lib/Conversion/PDLToPDLInterp/PredicateTree.cpp
index fe27a22294914e..dab15d23f6e0f5 100644
--- a/mlir/lib/Conversion/PDLToPDLInterp/PredicateTree.cpp
+++ b/mlir/lib/Conversion/PDLToPDLInterp/PredicateTree.cpp
@@ -818,7 +818,7 @@ std::unique_ptr<MatcherNode> &getOrCreateChild(SwitchNode *node,
   auto it = predicate->patternToAnswer.find(pattern);
   assert(it != predicate->patternToAnswer.end() &&
          "expected pattern to exist in predicate");
-  return node->getChildren().insert({it->second, nullptr}).first->second;
+  return node->getChildren()[it->second];
 }
 
 /// Build the matcher CFG by "pushing" patterns through by sorted predicate

[kazutakahirata]

@nikic Friendly ping. Thanks!

[nikic]

LG